TUESDAY, Feb. 23 (HealthDay News) -- The newest heart imaging CT technology exposes patients to as much as 91 percent less radiation than standard CT scanning, researchers say.

TUESDAY, Feb. 23 (HealthDay News) -- Although physicians still work long hours, the past decade has seen a sharp decline in the average number of hours they work each week, a new study finds.

TUESDAY, Feb. 23 (HealthDay News) -- Tests that try to single out who will have bleeding problems when they get a clot-preventing drug such as Plavix before surgery aren't ready for regular use, a new Dutch study concludes.

TUESDAY, Feb. 23 (HealthDay News) -- Two treatment methods for severe sepsis achieve similar short-term survival rates, a new study shows.

TUESDAY, Feb. 23 (HealthDay News) -- Elderly people who have been hospitalized have an increased risk of cognitive decline.

TUESDAY, Feb. 23 (HealthDay News) -- Annual screening with both mammography and MRI appears to be a cost-effective way to improve life expectancy in women at high risk for breast cancer, U.S. researchers say.

TUESDAY, Feb. 23 (HealthDay News) -- A popular nutritional supplement -- extract of bitter melon -- may help protect women from breast cancer, researchers say.

TUESDAY, Feb. 23 (HealthDay News) -- In some states, access to mammograms for women ages 40 to 49 has decreased since new breast cancer screening guidelines were released in November by the U.S. Preventive Services Task Force, according to a new survey.

TUESDAY, Feb. 23 (HealthDay News) -- Hospitals that spend more to treat patients don't necessarily have the best quality of care, researchers say.

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com:

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

TUESDAY, Feb. 23 (HealthDay News) -- People suffering from anxiety can find some relief through regular exercise, University of Georgia researchers report.

TUESDAY, Feb. 23 (HealthDay News) -- Sepsis and pneumonia caused by hospital-acquired infections killed 48,000 people and led to $8.1 billion in increased health care costs in the United States in 2006, says a new study by a project called Extending the Cure.

TUESDAY, Feb. 23 (HealthDay News) -- Rain and snow may seem like perfect incubators for the flu, but new research suggests that low humidity and unusually dry skies might be responsible for increases in influenza, such as those that occur during winter months.

TUESDAY, Feb. 23 (HealthDay News) -- Babies of women who take antidepressants during the latter part of pregnancy are slower in reaching some developmental milestones, new research shows.

TUESDAY, Feb. 23 (HealthDay News) -- If you're feeling sad, you're more likely to crave your favorite comfort food than exotic fare at a restaurant you've never eaten at before, because a negative mood makes the familiar more attractive, new psychological research suggests.

(HealthDay News) -- Deep vein thrombosis (DVT) occurs when a blood clot forms within a deep vein, most often in the calf or thigh area.

(HealthDay News) -- Chronic fatigue syndrome is characterized by extreme tiredness and a feeling of being worn out all the time, even after waking up. Its cause isn't understood.